Magnetic coupling of iron-based ferromagnetic nanoclusters encapsulated inside double-wall carbon nanotubes
- Author(s)
- Wilson Nieto, Johnny Chimborazo, Hidetsugu Shiozawa, Thomas Pichler, Paola Ayala, Dario Niebieskikwiat
- Abstract
Understanding the magnetic properties of hybrids of carbon nanotubes is an intriguing matter that offers a vastly unexplored playground for fundamental research and promising applications. The magnetic properties of bundles of double-wall carbon nanotubes encapsulating cementite ferromagnetic nanoclusters (of ∼ 3–4 nm in length) are here studied. VSM magnetometry shows clear evidence of interparticle magnetic interactions and a large interface exchange coupling of the nanoclusters with the carbon matrix, characterized by a surface anisotropy field HK∼67 kOe. Using a well-known measurement protocol, a magnetic activation volume for magnetization reversal was estimated as ∼420nm3. This large volume involves around 270 cementite nanoparticles mutually coupled through the conduction electrons of the nanotubes, which provide the ground for a large magnetic correlation length, thus favoring their possible application in spintronic devices.
- Organisation(s)
- Electronic Properties of Materials
- External organisation(s)
- Universidad San Francisco de Quito
- Journal
- Carbon Trends
- Volume
- 19
- No. of pages
- 6
- ISSN
- 0008-6223
- DOI
- https://doi.org/10.1016/j.cartre.2025.100483
- Publication date
- 04-2025
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103018 Materials physics
- Keywords
- ASJC Scopus subject areas
- Chemistry (miscellaneous), Materials Science (miscellaneous), Materials Chemistry
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/6faed187-676c-4dc9-a990-122707ad9062